| Family | Adoxaceae (also placed in Caprifoliaceae) |
| Scientific name | Viburnum japonicum (Thunberg) Sprengel |
| Synonyms | Cornus japonica Thunberg; Viburnum fusiforme Nakai |
| Common name | (Japanese common name) hakusan-boku (ハクサンボク, 白山木 [meaning: Mt. Hakusan tree]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (Yamaguchi Prefecture), Kyushu, Okinawa |
| (Other nations) Taiwan | |
| Chromosomal number | unknown |
| Description | Plants 2-6m tall. Leaves 7-15cm long. Flowers white corollas each 6mm, flowering in April to May. Evergreen. Shrub or subarbor trees. |
| Reference | Viburnum japonicum (Thunb.) Spreng. |
| May 2007 at Ibaraki Prefecture Botanical Garden |
May 2007 at Tsukuba Botanical Garden |
May 2007 at Ibaraki Prefecture Botanical Garden |
| May 2007 at Ibaraki Prefecture Botanical Garden |
| December 2007 at Tsukuba Botanical Garden |